Hypodermic cartridge

• US 3,187,749 A
• Filed: 01/04/1962
• Issued: 06/08/1965
• Est. Priority Date: 01/04/1962
• Status: Expired due to Term

• Current Assignee: Stanley J. Sarnoff
• Original Assignee: Stanley J. Sarnoff
• Inventors: Sarnoff, Stanley J.
• Application Number:
  US04/164,325
• Time in Patent Office: 1,251 Days
• US Class Current: 604/238
• CPC Class Codes: A61M 5/28 Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle

Claims

1. A CARTRIDGE FOR USE WITH A HYPODERMIC SYRINGE COMPRISING:

A STORAGE TUBE, A PISTON WITHIN ONE END OF SAID TUBE, A FIXED RESILIENT STOPPER HAVING OPPOSING FACES AND A BORE COMMNUICATING WITH SAID OPPOSING FACES OF THE STOPPER, SAID BORE BEING CYLINDRICAL SUBSTANTIALLY THROUGHOUT THE LENGTH OF THE STOPPER AND SAID STOPPER BEING WITHIN THE OTHER END OF THE TUBE, A FLUID MEDICAMENT IN THE TUBE BETWEEN THE PISTON AND STOPPER, A BEAD LARGER IN DIAMETER THAN ANY PORTION OF SAID BORE CLOSING OFF SAID BORE AND EMBEDDED IN THE RESILIENT STOPPER, AND A HOLLOW NEEDLE SMALLER IN EXTERNAL DIAMTER THAN THE DIAMETER OF THE BEAD AND LARGER IN DIAMETER THAN THE DIAMETER OF THE CYLINDRICAL PORTION OF THE BORE AND SNUGLY SLIDABLY ENGAGED BY THE WALLS OF SAID BORE, MEANS COOPERATING BETWEEN THE NEEDLE AND THE TUBE FOR GUIDING THE NEEDLE FOR RECTILINEAR MOVEMENT AXIALLY OF THE BORE, ONE END OF THE NEEDLE CONTACTING TO THE BEAD AND THE OTHER END EXTENDING EXTERIORLY OF THE STOPPER, SAID NEEDLE UPON MOVEMENT THEREOF INTO THE INTERIOR OF THE STOPPER AND TUBE, DISPLACING THE BEAD FROM THE BORE WHEREBY PASSAGE OF FLUID THROUGH THE NEEDLE IS UNRESTRICTED.